A Luis Muriel goal earned Colombia a 1-0 victory over Korea Republic that ensures they progress with a perfect record, though the losers will also go through as one of the best-third-placed teams.
Colombia had already secured a place in the Round of 16, but that didn't stop Eduardo Lara fielding a full-strength team, with the exception of Santiago Arias, who was one booking away from a suspension, sitting out.
The home fans didn't have to wait long to rise to the edge of their seats. Luis Muriel flicked the ball into the path of James Rodriguez, whose shot had sufficient power but insufficient accuracy. Korea Republic went straight up the other end, where Baek Sung Dong fired a superb strike from distance just wide of the post.
There was a recess in eventful action for 25 minutes, before Muriel thumped a 20-metre effort against the crossbar. The No9 did manage to ripple the net soon after, though. Muriel capitalised on hesitance from the goalkeeper No Dong Goen, rounded him, and passed the ball home.
Kim Young Uk produced a goal-bound shot on 44 minutes, but the reflexes of Cristian Bonilla ensured Colombia took a lead in at the break.
The second half was played at a lethargic pace. However, Bonilla did deny two Lee Ki Je free-kicks.
Muriel had Colombia's best opportunity, making space for himself wonderfully before his rasping 25-yard shot went just over. However, the miss did not prevent Colombia from picking up three points to finish the first phase of the tournament with a 100 per cent record.
The South Americans will now face one of the best third-placed sides in the Round of 16 in Bogota on Tuesday.